Add basic mod preset column implementation

osu.Game.Tests/Visual/UserInterface/TestSceneModPresetColumn.cs

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+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Collections.Generic;
+using System.Linq;
+using NUnit.Framework;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Game.Overlays;
+using osu.Game.Overlays.Mods;
+using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.Osu.Mods;
+
+namespace osu.Game.Tests.Visual.UserInterface
+{
+    public class TestSceneModPresetColumn : OsuTestScene
+    {
+        [Cached]
+        private OverlayColourProvider colourProvider = new OverlayColourProvider(OverlayColourScheme.Green);
+
+        [Test]
+        public void TestBasicAppearance()
+        {
+            ModPresetColumn modPresetColumn = null!;
+
+            AddStep("create content", () => Child = new Container
+            {
+                RelativeSizeAxes = Axes.Both,
+                Padding = new MarginPadding(30),
+                Child = modPresetColumn = new ModPresetColumn
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    Presets = createTestPresets().ToArray()
+                }
+            });
+            AddStep("change presets", () => modPresetColumn.Presets = createTestPresets().Skip(1).ToArray());
+        }
+
+        private static IEnumerable<ModPreset> createTestPresets() => new[]
+        {
+            new ModPreset
+            {
+                Name = "First preset",
+                Description = "Please ignore",
+                Mods = new Mod[]
+                {
+                    new OsuModHardRock(),
+                    new OsuModDoubleTime()
+                }
+            },
+            new ModPreset
+            {
+                Name = "AR0",
+                Description = "For good readers",
+                Mods = new Mod[]
+                {
+                    new OsuModDifficultyAdjust
+                    {
+                        ApproachRate = { Value = 0 }
+                    }
+                }
+            },
+            new ModPreset
+            {
+                Name = "This preset is going to have an extraordinarily long name",
+                Description = "This is done so that the capability to truncate overlong texts may be demonstrated",
+                Mods = new Mod[]
+                {
+                    new OsuModFlashlight(),
+                    new OsuModSpinIn()
+                }
+            }
+        };
+    }
+}

osu.Game/Localisation/ModPresetColumnStrings.cs

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+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Localisation;
+
+namespace osu.Game.Localisation
+{
+    public static class ModPresetColumnStrings
+    {
+        private const string prefix = @"osu.Game.Resources.Localisation.ModPresetColumn";
+
+        /// <summary>
+        /// "Personal Presets"
+        /// </summary>
+        public static LocalisableString PersonalPresets => new TranslatableString(getKey(@"personal_presets"), @"Personal Presets");
+
+        private static string getKey(string key) => $@"{prefix}:{key}";
+    }
+}

osu.Game/Overlays/Mods/ModPresetColumn.cs

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+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using osu.Framework.Allocation;
+using osu.Game.Graphics;
+using osu.Game.Localisation;
+using osu.Game.Rulesets.Mods;
+using osuTK;
+
+namespace osu.Game.Overlays.Mods
+{
+    public class ModPresetColumn : ModSelectColumn
+    {
+        private IReadOnlyList<ModPreset> presets = Array.Empty<ModPreset>();
+
+        /// <summary>
+        /// Sets the collection of available mod presets.
+        /// </summary>
+        public IReadOnlyList<ModPreset> Presets
+        {
+            get => presets;
+            set
+            {
+                presets = value;
+
+                if (IsLoaded)
+                    asyncLoadPanels();
+            }
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(OsuColour colours)
+        {
+            AccentColour = colours.Orange1;
+            HeaderText = ModPresetColumnStrings.PersonalPresets;
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            asyncLoadPanels();
+        }
+
+        private CancellationTokenSource? cancellationTokenSource;
+
+        private Task? latestLoadTask;
+        internal bool ItemsLoaded => latestLoadTask == null;
+
+        private void asyncLoadPanels()
+        {
+            cancellationTokenSource?.Cancel();
+
+            var panels = presets.Select(preset => new ModPresetPanel(preset)
+            {
+                Shear = Vector2.Zero
+            });
+
+            Task? loadTask;
+
+            latestLoadTask = loadTask = LoadComponentsAsync(panels, loaded =>
+            {
+                ItemsFlow.ChildrenEnumerable = loaded;
+            }, (cancellationTokenSource = new CancellationTokenSource()).Token);
+            loadTask.ContinueWith(_ =>
+            {
+                if (loadTask == latestLoadTask)
+                    latestLoadTask = null;
+            });
+        }
+    }
+}